Marx’s Analysis of Capital: Value, Labor Power, and Surplus Creation

Marx examines how capitalism creates, circulates, and expands value. He contrasts this with classical economists, arguing that the true source of surplus value lies in production rather than in the exchange of commodities. The lecture stresses that value is generated when concrete labor abstracts into abstract labor, allowing use‑values to become exchange‑values.

Labor Power as a Commodity

Labor power is presented as a unique commodity. Its purchase price equals the cost of reproducing the worker’s means of subsistence, yet the actual labor performed creates more value than that cost. This “schizoid nature” of labor power—its capacity versus its use—makes it the sole place where surplus value can be added.

Circulation versus Production

Marx separates the sphere of circulation (exchange) from the sphere of production (value creation). While circulation merely realizes value, it does not generate it. The “pernicious fantasy” of traders and economists who believe more can be gained from circulation alone is exposed as a misunderstanding of the hidden productive source.

Critique of Economists

Economists who focus exclusively on circulation miss the “difference in content lurking in the form.” By treating the capital system as a simple circuit of money and commodities, they ignore the deeper operation that turns products into capital. Marx calls this oversight a “pernicious fantasy” that mystifies profit.

Social and Historical Determination

The value of labor power and the needs it satisfies are not natural constants; they are historically and socially determined. Changes in the cost of basic necessities, such as rice, directly affect the reproduction cost of labor power and therefore the amount of surplus value that can be extracted.

Forms of Value and the General Formula

Value emerges from a “union of incompatibles,” where concrete labor becomes the bearer of abstract labor. Forms of value—equivalent and relative—work together, allowing money to precipitate out of exchange. The general formula of capital, M C M′ (or M C ΔM), captures the movement from money to commodity to a greater amount of money.

Commodity Exchange versus the Capital System

Marx focuses on the capital system as the signature of capitalism. In this system, survival becomes a “handmaid to the production of value.” Businesspeople and economists view the process through the lens of circulation, overlooking the productive core that Marx identifies.

Functions of Money and Economic Scales

In simple commodity exchange (C → C), money may serve as a standard of value or an account unit, but it does not necessarily mediate circulation. In larger economies (C → M → C), money becomes both a mediator and a means of circulation, bridging spatial and temporal separations between transactions.

The Circuit of Capital and Capitalist Advancement

Within the C M → M C circuit, money is “spent” to buy a commodity and then “gained” by selling it, ideally at equal exchange. For capitalists, however, money is “advanced” with the expectation of receiving more back. The circuit must be completed so that the original advancer recovers the initial money plus surplus.

The Source of Surplus Value

The “use value of money” is to bring more money, analogous to a seed producing a carrot. A supplement—labor power—must enter the picture; it cannot arise from circulation alone. Circulation merely realizes value, while the productive source of surplus lies in the hidden sphere of production.

Defining Capital and Valorization

Capital is described as “value held over time,” but more precisely as “value that is in movement” and that “valorizes itself.” Valorization occurs when capital transforms through production, returning with more than it originally possessed. Marx insists there must be a sufficient reason for this increase; nothing comes from nothing.

Labor Power as the Special Commodity

The buying and selling of labor power is the exclusive site where surplus value can be generated. Labor power’s value is set by its cost of reproduction, which is historically and socially determined. Capitalists pay this cost but receive actual labor, which creates value beyond the price paid.

The Laborer’s Schizonomy and Wage Form

Workers experience a “schizonomy”: they sell labor power, yet the employer receives the actual labor. Wages are driven down to the minimum historical means of subsistence. Although workers can organize, the capital system “eats its limits,” absorbing or counteracting attempts at improvement.

Controlling Costs and Increasing Surplus

Capitalists increase surplus by reducing the cost of goods needed for workers’ subsistence and by deploying technologies in infrastructure sectors. Lower prices for basic necessities directly raise profit margins.

Constant and Variable Capital

Workers constitute “variable capital” because the amount of surplus value extracted from them can be adjusted. This contrasts with “constant capital,” which refers to the value of means of production that does not create new value.

The Labor Process and the Four Xs

Marx identifies four mechanisms—extortion, expropriation, extraction, and exploitation—that describe how capital depletes workers. Workers loan their labor before being paid, making them the capitalist’s first creditor.

Production from the Capitalist’s Standpoint

Capitalists begin with advanced money, purchase raw materials and labor power, and transform these inputs into a commodity that sells for more than the invested sum. The output exceeds the initial money, delivering surplus value.

The Hidden Place of Production

Circulation conceals the true site of value creation. Production remains a “hidden fact” both empirically and deliberately, a fact that Marx uncovered by analyzing the real operations of the capital process.

Defining Labor and Laboring

Labor is “the thing done to transform one thing to another,” possessing both a subjective element (labor power) and an objective element (the workable). Human labor follows an intentional structure: a worker works a workable into a worked. Capitalists act as overseers, not as laborers themselves.

Laboring versus Labor

Laboring refers to the process itself, while labor denotes the capacity to effect change. Under capitalism, the basis of labor shifts, reflecting the system’s evolving demands.

The Working‑Day Chapter

Marx’s extensive discussion of the working day—spanning roughly 100 pages—examines the historical relationship between labor time, capital accumulation, and the struggle over the length of the workday.